The problem isnt the trannies underpowered, since they have no internal means of ignition. Its that the engines in front of them are over powered or over tourqed.
Seems a few things are needed to help keep any tranny alive. Get the biggest tranny cooler out there, let the dodge tranny cool down in Nuetural, since fluid is cut off in park on pre 2000 models. Maybe John can clearify that point on post 2000 models. Come to a complete stop before changing from R-D or D-R.
And change the fluids at least once per year.
Definetley keep it in Neatral,when running,set the parking brake.My fathers 2001 Dodge/Cummins does not circulate fluid in park either,so Id say that all Dodge owners should us neatral,any year.My 2000 dosnt circulate in park either.My Dodge trannys were good to me,I serviced them regularly,and as soon as i start it,every time,I throw it in N,out of habit,and set the brake.